Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug

Part Number: HA81785-HBC

32 Reviews | 12 Questions

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$20.72

Retail:$36.79

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hayes accessories and parts trailer brake controller plugs into ha81785-hbc

hayes accessories and parts trailer brake controller custom wiring adapter for controllers - dual plug

hayes accessories and parts plugs into brake controller ha81785-hbc

hayes accessories and parts trailer brake controller wiring adapter custom for controllers - dual plug

hayes accessories and parts trailer brake controller wiring adapter

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Install your Hayes electric trailer brake controller quickly and easily with this custom wiring adapter. One end plugs into the controller, and the other plugs into the built-in port beneath your vehicle's dash. 1-800-940-8924 to order Hayes accessories and parts part number HA81785-HBC or order online at etrailer.com. Free expert support on all Hayes products. Great prices and Fastest Shipping for Custom Wiring Adapter for Hayes Brake Controllers - Dual Plug. Accessories and Parts reviews from real customers.

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Hayes Accessories and Parts - HA81785-HBC

Features:

Plug-in wiring adapter allows for quick, simple installation of your electric trailer brake controller
No cutting or splicing required
- Custom connector end plugs into the built-in port beneath the dash of your vehicle
- Opposite end plugs into the back of your electric brake controller
Compatible with time-delayed and proportional brake controllers from Hayes
Made in the USA

Installation of Hayes Brake Controller Adapter

To install your Hayes electric brake controller, you need to connect the wiring of the controller to your vehicle. Certain auto manufacturers offer pre-wired options, typically known as tow packages, in which the wiring is run for you from the dash to the trailer connector on the back of your vehicle. Usually when this is done, a port is installed at your dash so that you can easily plug in a brake controller.

This adapter plugs into the 5-pin connector on your vehicle's built-in brake control wiring harness. The harness is located underneath the dash, to the left of the steering column, taped to another harness near the emergency brake pedal.

No hardwiring is required to install this adapter. After you plug it into the factory port, you simply plug the other end of the adapter directly into your electric trailer brake controller. Because there are no wires to connect, installation is not permanent. You can unplug and remove your brake controller at any time to transfer it to another vehicle or securely stow it away.

81785HBC Hayes Dual-Mated Brake Control Wiring Harness - Toyota and Lexus

Replaces 81785-HBC

This Product Fits The Following Vehicles

2003 - 2013 Toyota 4Runner with factory Tow Package
2010 - 2020 Lexus GX 460 with factory Tow Package
2003 - 2009 Lexus GX 470 with factory Tow Package
2003 - 2021 Toyota Land Cruiser with factory Tow Package
2003 - 2007 Lexus LX 470 with factory Tow Package
2008 - 2020 Lexus LX 570 with factory Tow Package
2003 - 2020 Toyota Sequoia with factory Tow Package
2005 - 2015 Toyota Tacoma with factory Tow Package
2003 - 2014 Toyota Tundra with factory 7-Way

Customer Satisfaction Score:

97% were satisfied with this product

3% of customers were not satisfied

Alternate product found

3% of customers were not satisfied

Alternate product found

4.7

32 reviews

5 Stars		(26)
4 Stars		(5)
3 Stars		(0)
2 Stars		(0)
1 Star		(1)

by: Todd 02/25/2018

2013 Toyota Tundra

Perfectly fit harness made hooking up my brake Controller a breeze in my 2013 Tundra.

The 4 pin quick fix flat connector worked decent ... a little tricky getting it snapped together after all 4 wires were in place as it appears it was not designed for this gage of wire but it did the job..

Click to Enlarge

Todd One Year Later

2/26/2019

Still working out perfectly!!

by: Darren 02/13/2019

2012 Toyota Tundra

The install cable that I ordered for my 2012 Tundra clicked right into place and allowed me to install my electric brake controller in minutes. Thank you guys for an accurate part number, order processing, and easy delivery!

Darren One Year Later

2/14/2020

Still working like a champ!

by: Mike H. 06/06/2015

2010 Toyota Tundra

Searched Auto part stores for brake controller conversion cable to mount brake controller from 2001 Toyota Tundra to 2010 Toyota Tundra with no luck. Searched internet and found E Trailer. Search on E Trailer was easy, as was ordering. Part fit perfectly.

by: Ken 05/31/2019

Toyota Tundra

Wasn't sure which harness to buy for my Toyota Tundra so I called and spoke with Donna in customer service. She looked up the right part #, three days later it was in my mailbox and one day later it was installed. I have purchased from etrailer before and have always been highly satisfied. Great place to do business with!

by: Troy 07/29/2019

Viewed installation and they recommended a patch cord to connect the brake. Glad I took their advice and ordered one. Called etrailer and spoke with Nicolas and he found the right cable for my truck in seconds and shipped it. Installed it in a matter of minutes. Good call on my part, no brainer to install.

by: Kent 08/19/2022

This wiring adapter did not fit my 2006 Toyota Tundra.

David B.

9/5/2022

How is it not working. Just not fitting the adapter? What adapter plug are you using? Could it be possible you are using the wrong plug?

by: Evan 12/20/2021 One Year Later

Good fit with enough length to put it by the right side of the steering wheel and not have any wires hanging down

by: Amanda 07/31/2019

Toyota 4Runner

Worked perfect with my brake control system for my Toyota 4runner. It was a great price and will definitely shop with etrailer again.

by: Keith B 06/18/2020 One Year Later

2015 Toyota Tacoma

Easy install in my 2015 Tacoma with factory towing package.

by: Anthony 06/03/2024

Plugged right in to my truck, plugged into my hayes controller, could have used an extra few inches of cord but overall its great.

by: Kyle 10/17/2020

These people are great. I ordered a product and it was not available to ship for a month. Instead of settling for that they sent me an email letting me know there were products available as a replacement if that extended delivery time was not acceptable. I called to discuss the other substitute items and spoke with an actual person who spent the time to make sure what I chose would fit my needs. The package we decided was best came in the exact time they said it would. I am glad to know some people still know service is part of doing business.

by: Cordell 05/30/2018

2005 Toyota Tacoma

The harness worked as it was advertised. The service was fantastic

by: Rita 11/17/2020

Really pleased to see that this was made in USA - I can assume quality on such a safety-critical item. It fit right and was easy to install.

by: Cindy B 03/12/2017 One Year Later

Ty for following up with your product that we purchased si far so good*

by: Alan 08/06/2021

just that all your services have been

***** O U T S T A N D I N G *****
thanks ...

by: Mike 11/18/2016 One Year Later

Super easy

by: Don 11/09/2021 One Year Later

Works great!

by: Drexel 03/03/2015

2008 Toyota Tacoma

Worked like a charm.

by: William 02/26/2023

Made installing a snap.

by: Glenn 08/21/2022

2018 Lexus GX 460

Made job easy

by: Russell 11/19/2023 One Year Later

by: Dave 09/05/2022

by: Erin 02/13/2024

by: Doug 04/13/2024

by: Jordan 11/13/2021

true

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See what our Experts say about this Hayes Accessories and Parts

Do you have a question about this Accessories and Part?

How to Connect a Hayes Engage Trailer Brake Controller # HA81760 in a 2008 Toyota Tundra
To install the Hayes Engage Trailer Brake Controller # HA81760 on your 2008 Toyota Tundra with a factory 7-way you wouldn't need to do any hardwiring. All you would need to do is plug in the # HA81785-HBC harness to your factory brake controller install port. The harness is located underneath the dash, to the left of the steering column, taped to another harness near the emergency brake pedal. The green wires that you have found on the brake controller port would not be needed to install...
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Parts Needed to Install Brake Controller in 2006 Toyota Highlander
Your 2006 Toyota Highlander does not have a brake controller port under the dash of the vehicle so we do not have any install harness that would work. You will need to start with a 4-way (if you do not have one). For that you would want the # 118413. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7. I attached installation instructions and an install...
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Wiring Adapter to Install Hayes Synchronizer # HA81725 Brake Controller in 2008 Toyota Tacoma
Hayes does indeed offer a brake controller wiring adapter that's compatible with the 2008 Toyota Tacoma that's equipped with the factory 7-way trailer connector, part # HA81785-HBC. I've provided you a photo of what the connector that will plug in under the dash looks like. It's a four pin connector, and you can clearly see the pin-out in the photo I've edited for you. Your factory connector under the dash will have 5 pins, but the aftermarket wiring adapters and brake controllers only...
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Hayes Brake Controller and Install Harness Recommendation for a 2013 Toyota Sequoia
Yes, the Hayes brake controller install harness part # HA81785-HBC that you referenced is compatible with your 2013 Toyota Sequoia and would be the correct harness to use to install a Hayes brake controller like the Hayes Genesis part # HA81790.
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Correct Wiring Adapter to Install Hayes Syncronizer Brake Controller in 2015 Toyota Tacoma
Sounds like your Tacoma has a factory 7 way, so, yes the adapter you will want is # HA81785-HBC. To install your Hayes electric brake controller, you need to connect the wiring of the controller to your vehicle. This adapter plugs into the 5-pin connector on your vehicle's built-in brake control wiring harness. The harness is located underneath the dash, to the left of the steering column, taped to another harness near the emergency brake pedal. No hardwiring is required to install this...
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Troubleshooting Lack Of Braking Power With A Hayes Energize III+ Brake Controller
Hey Josh, The Custom Wiring Adapter for Hayes Brake Controllers # HA81785-HBC you used to plug in your Hayes Energize III+ Trailer Brake Controller # HA81742B would have a ground. Since it's lighting up we know it's getting power and this isn't a fuse issue so it's likely a wiring issue with either the 7-way on your Lexus or with the trailer wiring. You'll want to use a multimeter # PT89ZR to test the brake controller output pin on the Lexus' 7-way when the manual override is being...
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Does Hayes Blackbird Brake Control Wiring Harness Need Extra Ground Wire on 2014 Toyota Tundra
I think what you mean is does wiring harness # HA81785-HBC require a separate and additional ground wire for a 2014 Toyota Tundra. Good news! It doesn't. Only the Tekonsha brake controller wiring harness, # 3040-P, has that additional ground wire since the ground in the factory connection point is insufficient for the Tekonsha controllers. The Hayes harness # HA81785-HBC only uses the factory ground so no additional ground is needed for the controller to operate effectively and properly.
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Brake Controller Wiring Harness for Hayes Brake Controller and 2006 Toyota Tacoma
I did some checking and brake controller wiring harness # HA81785-HBC for Hayes brake controllers does fit your 2006 Toyota Tacoma.
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Which Hayes Brake Control Wiring Adapter for 2004 Toyota Sequoia
The Custom Wiring Adapter for Hayes Brake Controllers # HA81785-HBC is the correct one to install a Hayes controller like their Engage Time Delayed Trailer Brake Controller # HA81760 in a 2004 Toyota Sequoia with factory 7-way. The linked videos will give you additional details about these two items.
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Harness Needed To Install Hayes Trailer Brake Controller On a 2020 Toyota Sequoia
In order to install the Hayes-Lemmerz Energize III+ Electric Trailer Brake Controller part # HA81742B on a 2020 Toyota Sequoia you can use the Custom Wiring Adapter for Hayes Brake Controllers part # HA81785-HBC so long as you have the factory tow package. If you don't have the factory tow package you will need to hardwire the unit, let me know if this is the case.
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Will Hayes Genesis Brake Controller Work on a 2005 Toyota Tundra Limited
The Hayes Genesis # HA81790 with the adapter # HA81785-HBC is exactly what you need if your 2005 Toyota Tundra has the factory 7-Way. If your Tundra doesn't have a factory 7-Way then you'll need to use the pigtail # HA81789-HBC instead of the adapter, plus you'll need to install a 4-Way # C59236 and the Universal Installation Kit # ETBC7. As far as the air bag suspension goes, the Firestone # F4130 are for new Ram pickups so for your Tundra you're going to need the Firestone Ride-Rite...
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Can Hayes G2 Brake Controller Activate Tandem Axle Brakes Install Harness for 2013 Toyota Tundra
Yes, the Hayes G2 brake controller part # HA81792BB can activate the brakes of a tandem axle trailer that has brakes on all axles. The correct custom fit install harness for the controller in your 2013 Toyota Tundra that is pre-wired for a brake controller is the part # HA81785-HBC which is all you'd need.
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Do you have a question about this Accessories and Part?

Info for this part was:

Edited by:

Lindsey S

Expert Research:

Michael H

Expert Research:

Jameson C

Expert Research:

Adam R

Updated by:

Laura H

Updated by:

Wilson B

Updated by:

Michael B

Installed by:

Cole B

Installed by:

Andy C

Written by:

Tammy D

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